How do you heat water in your home?

We use a gas water heater to heat water in the house. If we open a water tap, the gas water heater turns on automatically. When the tap closes, the gas water heater also turns off. The water flows through curved pipes that are wrapped around a metal box. There are many gas lights burning inside this box. Carbon dioxide from gas combustion is discharged into the street through a special pipe. The water heating temperature is controlled by the gas supply. The more gas burns, the hotter the water and vice versa. Water can even boil if you turn on the gas too much. The average price of such a gas water heater in our region is about $200. The price of a cubic meter of gas is about 2 dollars. To heat a full bath of water (52 gallons) you need to spend about $2. Only 2 dollars and you can lie in very hot water. I think this is happiness in winter. Write in the comments how you heat water in your home...